Rap without the letter E. No E in HVAC!

HVAC related, no, fun? You be the judge

Directly from HARO:

The letter E is the most commonly used letter in the English
alphabet. Could you imagine trying to write without using it?
We've already used it 16 times - 17 now! Andrew Huang went even
further and wrote a rap sans the popular vowel. Have a listen.
Did you miss it? Neither did we.